package demo1;
//这是测试学习接口的Test USB测试类
public class TestUsb {
    public static void main(String[] args) {
        Computer computer =  new Computer();
        computer.powerOn();

        //使用鼠标设备
        computer.useDevice(new Mouse());

        //使用键盘设备
        computer.useDevice(new KeyBoard());

        computer.powerOff();
    }
}
